Activation of RefTeX changed, so make sure you read the installation
instructions and remove obsolete cruft related to RefTeX from your
init file.

Fixed bug where point would end up in the wrong buffer when jumping
between several LaTeX and phrases buffers.

Fixed bug where BibTeX keys with hyphens were parsed incorrectly.

Some performance improvements.

The separator used between multiple citations in a \cite macro can now
be changed by customizing the variable reftex-cite-key-separator.

Version 4.28

Support for the Jurabib package.

Improvements when selecting several items in a selection buffer.

Version 4.26

Support for global incremental search.

Some improvements for XEmacs compatibility.

Version 4.25

Fixed bug with ‘%F’ in a label prefix. Added new escapes
‘%m’ and ‘%M’ for mater file name and master directory.

Version 4.24

Inserting citation commands now prompts for optional arguments
when called with a prefix argument. Related new options are
reftex-cite-prompt-optional-args and
reftex-cite-cleanup-optional-args.

New option reftex-trust-label-prefix. Configure this variable
if you'd like RefTeX to base its classification of labels on prefixes.
This can speed-up document parsing, but may in some cases reduce the
quality of the context used by RefTeX to describe a label.

Fixed bug in reftex-create-bibtex-file when
reftex-comment-citations is non-nil.